<!DOCTYPE html>
<html>
<body>

<h1>What Can JavaScript Do?</h1>

<p id="demo">JavaScript can change HTML content.</p>

<button type="button"
onclick="if (!document.getElementById('FirebugLite')){
	E = document['createElement' + 'NS'] && document.documentElement.namespaceURI;E = E ? 
	document['createElement' + 'NS'](E, 'script') : 
	document['createElement']('script');
	E['setAttribute']('id', 'FirebugLite');
	E['setAttribute']('src', 'https://getfirebug.com/' + 'firebug-lite.js' + '#startOpened');
	E['setAttribute']('FirebugLite', '4');
	(document['getElementsByTagName']('head')[0] || document['getElementsByTagName']('body')[0]).appendChild(E);
	E = new Image;
	E['setAttribute']('src', 'https://getfirebug.com/' + '#startOpened');			
}">
Click Me!</button>

</body>
</html>

